Odorless drain assembly

ABSTRACT

An “odorless drain assembly” comprises an outer cylinder ( 23 ) with an open top wall, and an inner cylinder ( 21 ); said outer cylinder ( 23 ) is connected with the inner cylinder ( 21 ) by a common base ( 22 ); and a gap (D) is formed in between; said outer cylinder ( 23 ) is extended with an outer edge curled down and around as a lip portion ( 24 ); and a perforated sleeve ( 30 ) covers up said inner cylinder ( 21 ) with an open bottom wall extended with an outer edge curled up (U-shape) and around as a stopper ring ( 31 ). The diameter of said perforated sleeve ( 30 ) is larger than the inner cylinder ( 21 ) but smaller than the outer cylinder ( 23 ); thereby separate inner gap (D 1 ) and outer gap (D 2 ) are divided from the gap (D); further a plurality of pores ( 32 ) formed at the lower half portion of a side wall of the perforated sleeve ( 30 ).

FIELD OF THE INVENTION

The present invention is related to a drain assembly; particularly to an “odorless water drain assembly” that prevents insects and bad odor from coming out of the septic tank or drainage pipe without using the conventional P-traps, found in conventional drainage system being used.

GROUND OF THE INVENTION

Prior known conventional water sewerage or drainage system are those drain assemblies used in kitchen sinks having P-traps to confine water and to trap odor from coming out of the septic tank or drainage pipe.

However, these P-traps can only be used for sewerage system that are installed above the floor with a big space and reserve clean-out rooms, but can not be installed in the flooring or bathroom floors.

Conventional drainage system used in bathroom floor or flooring were provided with strainer to filter the water that is flowing to the drainage pipe or septic tank, but it is not capable of filtering or blocking or sealing odor from coming out of the drainage system.

However, mounting of the “odorless drain assembly” of the present invention under the floor for flowing water to prevent a stagnant pool or backwater, the “odorless drain assembly” is provided with an outer cylinder which has an open top sealed by a cover. A plurality of filtration pores formed through the cover allow water to flow through, but debris are retained on the cover. An inner cylinder is extended upward from the bottom of the outer cylinder. A water reservoir is therefore defined between the inner and outer cylinders. While water flowing in the reservoir exceeds the top of inner cylinder, water will flow into said drainage system. A plurality of filtration pores formed through at the bottom end of perforated sleeve let the water filtered and flow to inner cylinder, but sediments are retained inside the inner cylinder.

However, although debris and sediments may be retained by the cover of outer cylinder, and the inner cylinder respectively; but insects and bad odors coming out from the drainage system could be blocked and trapped. Furthermore, debris and sediments can be regularly cleaned out just using simple tools.

Furthermore, the “odorless drain assembly” connected to the drain pipe by an adapter further wrapped around with water tight tape or seal to flow water without trickling water or leaking water therefrom.

SUMMARY OF THE INVENTION

It is therefore the primary object of the present invention to provide an “odorless water drain assembly” to solve problems and drawbacks of the prior inventions.

Still another object of the present invention is to provide an “odorless water drain assembly” (also known as “odorless drain assembly”) composed of an outer cylinder (23) and an inner cylinder (21), said outer cylinder (23), being adapted to be fixed on the floorings leading to drain pipe or septic tank, has an open top wall and a bottom wall with a central hole bounded by a drain tube (26) defining a water reservoir thereon, while said inner cylinder (21) having a side wall, a top wall and a flanged open bottom portion adapted to enclosed the drain tube (26), as the inner cylinder (21) is held within the outer cylinder (23), defining a water seal and an odor and insect trap provided by the water reservoir held between the walls of the inner cylinder (21) and the outer cylinder (23).

In detail, said outer cylinder (23) is integrally connected with the inner cylinder (21) by a common base (22) in between; said water reservoir defining by a gap (D) among the common base (22) and the outer cylinder (23) and the inner cylinder (21); the open top wall of said outer cylinder (23) with an outer edge curled down and around to form a lip portion (24); and a perforated sleeve (30) has an open bottom wall is disposed inside the outer cylinder (23) to cover up said inner cylinder (21). Further, the open bottom wall of said perforated sleeve (30) with an outer edge curled up (U-shape) and around to form a stopper ring (31); a diameter of said perforated sleeve (30) is larger than the inner cylinder (21) but smaller than outer cylinder (23); thereby separate inner gap (D1) and outer gap (D2) are divided from the gap (D). Further a plurality of pores (32) distributed through preferably a lower half portion of a side wall of the perforated sleeve (30), where water flowing from the outer cylinder (23) into the inner cylinder (21) along protracted zigzag paths provided by the pores (32). A width of said inner gap (D1) is preferably smaller than the outer gap (D2). And, an open top wall of said inner cylinder (21) is preferably slanted at an angle Θ.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1: is a sectional view of the “odorless drain assembly” of the first embodiment of the invention;

FIG. 2: is a perspective sectional view of FIG. 1;

FIG. 3: is a sectional view of the “odorless drain assembly” of the second embodiment of the invention;

FIG. 4: is a schematic view of the assembled “odorless drain assembly” of FIG. 3 is further connected to both an upper adapter and a lower adapter;

FIG. 5: is a sectional view of the assembled “odorless drain assembly” of FIG. 3 centrally connected to a drainage pipe;

FIG. 6: is a sectional view of the assembled “odorless drain assembly” of FIG. 3, where the inner cylinder is circumscribed inside the outer cylinder in an eccentric configuration and connected to a drainage pipe, which is transversally connected to drainage system;

FIG. 7: is a perspective sectional view of the “odorless drain assembly” of the third embodiment of the invention;

FIG. 8: is a top view of FIG. 7;

FIG. 9: is a cross sectional view of the “odorless drain assembly” connected to a drainage system of FIG. 7, water flowing into the inner cylinder from the open top wall in part;

FIG. 10: is a schematic view of cleaning away sediments deposited on the stopper ring of the perforated sleeve, which is taken out from the “odorless drain assembly” rotated in counterclockwise or clockwise direction;

FIG. 11: is a perspective sectional view of the “odorless drain assembly” of the fourth embodiment of the invention;

FIG. 12: is an explode view of FIG. 11;

FIG. 13: is a schematic view of another type of the fourth embodiment of the “odorless drain assembly” of the invention;

FIG. 14: is a sectional view of another type of the fourth embodiment of the “odorless drain assembly” of the invention; and

FIG. 15: is a cross sectional view of the fifth embodiment of the “odorless drain assembly” of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION

In accordance with a first exemplary embodiment of the present invention as shown in FIGS. 1 and 2, an “odorless water drain assembly” generally designated as (1). Hereinafter, to facilitate understanding of the present invention, the “odorless drain assembly” is described in detail according to the preferred embodiments and by referring to the accompanying description and drawings.

First Embodiment

As shown in FIGS. 1 and 2, an “odorless drain assembly” (1) includes a cylinder assembly (20) and a perforated sleeve (30) disposed inside the cylinder assembly (20). The cylinder assembly (20) comprises an outer cylinder (23) and an inner cylinder (21); said outer cylinder (23), being adapted to be fixed on a flooring drainage pipe which leading to a drainage system or a septic tank. It has a slanted open top wall and a bottom wall with a central hole bounded by a drain tube defining a water reservoir (25) thereon, said inner cylinder (21) has a side wall, and a flanged open bottom portion adapted to enclosed the drain tube when held within the outer cylinder (23) defining a water seal and an odor and insect trap provided by the water reservoir held between the walls of the inner cylinder (21) and the outer cylinder (23). Said outer cylinder (23) is integrally connected with said inner cylinder (21) by a common base (22), and said reservoir (25) is substantially formed thereamong. Furthermore, a gap (D) is defined among walls of said inner cylinder (21) and said outer cylinder (23) and the common base (22). An open top wall of said inner cylinder (21) is preferably slanted at an angle Θ. The open top wall of said outer cylinder (23) is further extended with an outer edge curled down and around almost at a right angle to form a lip portion (24). A perforated sleeve (30) with an open bottom wall is disposed inside the outer cylinder (23) to cover up said inner cylinder (21); further, the open bottom wall of said perforated sleeve (30) is extended with an outer edge curled up. (U-shape) and around to form a stopper ring (31). Whereby, the height of said inner cylinder (21) is lower than said perforated sleeve (30), in turn, the perforated sleeve (30) is lower than said outer cylinder (23). Or the perforated sleeve (30) can be designed with a height equal to the outer cylinder (23). At the same time, a diameter of said perforated sleeve (30) is larger than said inner cylinder (21), but smaller than said outer cylinder (23). However, separate inner gap (D1) (among walls of said inner cylinder and said perforated sleeve and common base) and outer gap (D2) (among walls of said outer cylinder and said perforated sleeve and common base) are divided from the gap (D). Moreover, a plurality of pores (32) preferably formed through a lower half portion of said wall of the perforated sleeve (30) to circulate water flowing from the outer cylinder (23) into the inner cylinder (21) along protracted zigzag paths formed along said pores (32), then flow over the top edge (21 a) of inner cylinder (21).

As shown in FIG. 2, a tapered tap (10) is mounted on said open top wall of the cylinder assembly (20); the tapered tap (10) is hollowed inside. A bottom perimeter of said tap (10) is extended with an inner edge zigzag bent and around to form a round hoop portion (11 a). The round hoop portion (11 a) is not only interlocked with the lip portion (24), but also bifurcated with a bifurcated tongs portion (11 c) extended inward to resist against the cylinder assembly (20) in tight sealed position. A top perimeter of said tap (10) is extended with an outer edge curled down and around to form a clasp portion (11 b). An annular groove (24 a) formed in a concaved portion of the lip portion (24) is adapted to led in the round hoop portion (11 a). Also the bifurcated tongs portion (11 c) is extended downward from the round hoop portion (11 a), and the bifurcated tongs portion (11 c) is extended toward the cylinder assembly (20), which is therefore held under the tapered tap (10) as an upward and downward movement prevention structure.

The bottom of said cylinder assembly (20) is extended downward with a drain tube (26) for connection to a drainage system or a septic tank. The open top wall of said outer cylinder (23) has inner threads (27) formed on an inner surface thereof to screw to the bottom perimeter of said tapered tap (10). Further, a bottom end of the inner threads (27) is formed with an annular groove (28), a sealing O-ring (90) (refer to FIGS. 3 and 4) is led into the annular groove (28) to prevent flowing water from leaking out.

An inner wall of said perforated sleeve (30) is protruded inward with platelets (34); each of the platelets (34) is protruded inward from the rim of each pore (32) likely four-pronged display hook elastically against the inner cylinder (21) by a planar surface. Thus the perforated sleeve (30) is held within the cylinder assembly (20) without any horizontal/oblique movements. The top wall of said perforated sleeve (30) is further extended with an outer edge curled down and around to form a clasp portion (33), whereby the, perforated sleeve (30) held within the cylinder assembly (20) in position by the platelets (34) can be easily taken out from the cylinder assembly (20) by the clasp portion (33) manually.

Said lip portion (24) curled down and around has a hollowed inside for fitting in the bottom perimeter of said tapered tap (10). The hollowed inside substantially has a width (W) larger than an outer diameter of said drainage pipe, when the cylinder assembly (20) fit in the drainage pipe, although a gap (61) (refer to FIG. 10) is formed between walls of the drainage pipe and the cylinder assembly (20), the gap (61) can be sealed up by silicone. Further the cylinder assembly (20) led into the tapered tap (10) in position by means of the lip portion (24) interlocked with the round hoop portion (11 a). Cylinder assembly (20) hanging from inside the tapered tap (10) is performed as well as said gap (61) (refer to FIG. 10) sealed up to prevent bad odor (T) (refer to FIG. 9) from coming out the cylinder assembly (20).

As shown in FIG. 1, after said perforated sleeve (30) being led into said cylinder assembly (20), said reservoir (25) is split into a filtration reservoir (25 a) to filter out debris and a flowing reservoir (25 b) for a speedy water flowing. It means said inner gap (D1) and said outer gap (D2) are divided from the gap (D). Said reservoir (25) (i.e. said gap (D)) accommodates division of water flowing for the filtration reservoir (25 a) (i.e. said outer gap (D2)) to flow, and division of debris filtering for the flowing reservoir (25 b) (i.e. said inner gap (D1)) to filter out. Water continues flowing into the filtration reservoir (25 a), the flow-in water pressure and water volume may force upward water accumulated inside the flowing reservoir (25 b) to be risen rapidly. Till water is rising over open top wall (21 a) of said inner cylinder (21) and overflowing into the inner cylinder (21) and downward flowing to the drainage pipe (60) to drain out. Because said open top wall (21 a) is slanted at an angle Θ, thus the open top wall (21 a) is not substantially axially flush at the same height, but up and down undulates into a circle around the open top wall (21 a). The height of said perforated sleeve (30) is different from said inner cylinder (21) by a gap (E). When flowing reservoir (25 b) is filled and forced upward with small volume of flow-in water; which may overflow said open top wall (21 a) in part only through the lowest portion or more of said open top wall) (refer to FIG. 7), but a significant amount of water will overflow from overall most of said open top wall (21 a) rapidly (as shown in FIG. 13). Thus a water volume adjustable effect is achieved.

Next, the pores (32) will filter out hairs, scraps of paper and foliage are retained within the filtration reservoir (25 a) as sediments (70) filtered out to avoid from clogging up the drainage pipe (60). Further, water flowing reduces, and stops overflowing into the inner cylinder (21), a significant amount of still water retained in the reservoir (25) prevents insects, or bad odor (T) (refer to FIG. 9) from coming out of said cylinder assembly (20).

Second Embodiment

As shown in FIG. 3, said “odorless drain assembly” (1) connected to the drainage pipe (60) at bottom ends of, for example, bath tub, or wash sink directly, there is no need to cap the tapered tap (10)(refer to FIGS. 1 and 2) of the first embodiment on the “odorless drain assembly” (1). In detail, as shown in FIGS. 4 and 5 and 6, said inner threads (27) formed on said inner surface of said open top wall of said outer cylinder (23) screwed to an upper adapter (80 a) beneath said wash sink or said bath tub. Said base (22) of said cylinder assembly (20) is extended downward with said drain tube (26) connected to a lower adapter (80 b) in connection with said drainage pipe (60) (refer to FIGS. 5 and 6) for draining out water. Inner and outer surfaces of said upper and lower adapters (80 a, 80 b) are provided and formed with different numbers of threads (81 a, 81 b). Furthermore, both of said upper and lower adapters (80 a, 80 b) are extended horizontally with a rigid outer edge shaped in hexagonal shape and circular shape respectively to form clasp portions (82) to facilitate rotations of said upper and lower adapters (80 a, 80 b) manually.

Said lower adapter (80 b) (refer to FIG. 5) consists of an outer cylinder (83) with an open bottom wall, and an inner cylinder (84), which is hollowed inside, installed inside the outer cylinder (83). Said inner cylinder (84) is connected with said outer cylinder (83) integrally by a common top (85). As shown in FIG. 6, said outer cylinder (83) is circumscribed by a side wall of said inner cylinder (84) of said lower adapter (80 b) in an eccentric configuration. At that time, a long drain tube (26) cut short to afford dimensions of said drainage pipes (60) to facilitate the drainage pipe (60) being transversally connected to said drain, tube (26). Inner and outer surfaces of said inner and outer cylinders (83, 84) are also provided with and formed with different numbers of threads (81 a, 81 b).

Third Embodiment

As shown in FIGS. 7-9, the stopper ring (31) of said perforated sleeve (30) is elastically against said wall of the outer cylinder (23); said round hoop portion (11 a) of the tapered tap (10) is further extended with an outer edge curved down and around likely forming a clasp portion. At the same time, as shown on FIGS. 2 and 4 the branched flange (11 c) is omitted. It also omits the extended drain tube (26) of said cylinder assembly (20), said threaded portion (27), said-annular groove (28), said clasp portion (33) and said platelets (34) of the sleeve (30). Thus, a simplified odorless drain assembly (1) of the third embodiment can be easily installed to drainage pipe. In detail, as shown in FIG. 10, said stopper ring (31) is extended with an outer edge curled up (U-shape) and around to resist against said wall of the outer cylinder (23). From a sectional view of FIGS. 10, the stopper ring (31) is substantially extended and shaped in U-shape, whose length is capable of being conformed to straddle across a gap between walls of said outer cylinder (23) and the perforated sleeve (30) to eliminate any gap otherwise may be formed between the stopper ring (31) and the outer cylinder (23). By such a design, sediments (70) (refer to FIGS. 9 and 10) can be prevented from entering into said flowing reservoir (25 b), further the sleeve (30) can be taken out from the top of cylinder assembly (20) safely. Further the stopper ring (31) on the sleeve (30) is retained and filled with the sediments (70) of the reservoir (25), and clean away the sediments (70) with water.

Fourth Embodiment

As shown in FIGS. 11-12, the fourth embodiment of the present invention is illustrated. The fourth embodiment differ the prior embodiments from a top perimeter (12) of the tapered tap (10) received with a water-filtration cover (40). A plurality of pores (41) formed through the cover (40) filters out large debris. The water-filtration cover (40) is made of metal sheet, but the cover (40) is extended with an outer edge bent down and around to shape the brim of the cover (40) with a height increased to the cover (40). Thereby the cover (40) can be used to cap over the tap (10), but not to be inlaid into the tap (10). Thus, the cover (40) can be freely taken out from the tap (10). As a result, the “odorless drain assembly” (1) is provided with dual water filtration capacity, water retained inside the reservoir could prevent air from flowing out of the “odorless drain assembly”, and prevent insects and bad odor from coming out of the drainage system. Further the cover could be taken out from the drain assembly washing with water.

As shown in FIG. 13, said cover (40) replaced by a ceramic cap (40) with side arches (41) for flowing water into the “odorless drain assembly”. As the ceramic cap covers up the tap (10), it facilitates water flowing. Such a design is suitably assembled to urinals to filter out large debris piled up on the ceramic cover (40), but small debris are deposited in the filtration reservoir (25 a), further bad odor coming out of the septic tank can be effectively sealed therefrom.

As shown in FIG. 14, said cover (40) is replaced by a pull plug (50) made of rubber. Said top perimeter (12) is transformed into a tapered rim to facilitate the tapered pull plug (50) to plug in or to be taken out from the “odorless drain assembly”. Odorless drain assembly (1) combined with such a pull plug (50) is suitable for bathtub, reservoir, washbowl etc., to retain water.

Fifth Embodiment

As shown in FIG. 15, said “odorless drain assembly” is further simplified as a promoted civic type by said cylinder assembly (20) combined with said sleeve (30); said tap (10) is not required in use. Such a design is easy to install on a floor.

Advantages and benefits can be achieved by embodiments of the present invention as following:

1. The “odorless drain assembly” (1) is provided with features such as a gap (E) between top perimeters of said inner cylinder (21) and said sleeve (30) at a slant angle Θ, a width of said inner gap (D1) is narrower than a width of said outer gap (D2). A significant amount of water flowing into the “odorless drain assembly” and overflowing into the drainage pipe by an overall open top wall of said inner cylinder. When water flowing is reduced, overflowing into the drain pipe only by a lower portion of said slanted open top wall. Since the reservoir is retained and filled with water, even small drops of water will not leak out from the open top wall of said inner cylinder, it can prevent insects and bad odor from coming out from the drainage system.

2. Said cylinder assembly (20) connected to said upper adapter and said lower adapter by a threaded portion and a drain tube respectively, to facilitate users connected to water bathtub, washing sink and drainage pipe of dimensions. Even the lower adapter can be adjusted to adapt to drainage pipes eccentrically or centrally.

3. Said tapered tap is suitable for receiving covers of dimensions. Further, with dual water filtration capacity, water retained inside the reservoir could prevent air or sewer gas from flowing out of the “odorless drain assembly”, and prevent insects, bad odor and worm from coming out the drainage system. Further, the cover replaced by a pull plug, the tapered tap can be used as a reservoir filled with water.

4. The conventional traps, while they are rendered rapid or aspirated drain will create a gap for the water seal and will cause sewer gas to return and permeate the building. The “odorless drain assembly” will be a double protection for the conventional traps.

5. The “odorless drain assembly” can be filled up by little cooking oil or light motor oil (No. 10-No. 30 motor oil), to take place of water reservoir. This will prevent oil from evaporation and opens traps to regorged sewer gas for quite a long period. In doing so, the house or building will not be permeated with foul smell even if the building is not inhabited for a long time. 

1. An odorless drain assembly comprises: a cylinder assembly (20) consists of an outer cylinder (23) with an open top wall, and an inner cylinder (21) with an open slanted wall at an angle e disposed inside the outer cylinder (23); said outer cylinder (23) is integrally connected with the inner cylinder (21) by a common base (22); a gap (D) is formed among the outer cylinder (23) and the inner cylinder (21) and said common base (22); said outer cylinder (23) is extended with an outer edge curled down and around to form a lip portion (24); and a perforated sleeve (30) disposed inside the outer cylinder (23) with a open bottom wall, said perforated sleeve (30) covered up said inner cylinder (21); said open bottom wall of said perforated sleeve (30) is extended with an outer edge curled up (U-shape) and around to form a stopper ring (3 1); a diameter of said perforated sleeve (3.0) is larger than the inner cylinder (21) but smaller than the outer cylinder (23); thereby separate inner gap (D1) and outer gap (D2) are divided from the gap (D); further a plurality of pores (32) formed at a lower half portion of a side wall of the perforated sleeve (30), where water may flow from the outer cylinder (23) into the inner cylinder (21) along protracted zigzag paths provided by the pores, and filter debris at the same time.
 2. The odorless drain assembly of claim 1 wherein a tapered tap (10) is mounted on said open top wall of the cylinder assembly (20); a bottom perimeter of said tap (10) is extended with an inner edge zigzag bent and around to form a round hoop portion (11 a) interlocked with the lip portion (24); a top perimeter of said tap (10) is extended with an outer edge curled down and around to form a clasp portion (11 b).
 3. The odorless drain assembly of claim 2 wherein an annular groove (24 a) formed in a concaved portion of the lip portion (24) is adapted to led in the round hoop portion (11 a); the round hoop portion (11 a) is bifurcated with a bifurcated tongs portion (11 c) to resist against the cylinder assembly (20) in position.
 4. The odorless drain assembly of claim 2 wherein said tapered tap (10) received with a filtration cover (40) with side arches (41).
 5. The odorless drain assembly of claim 2 wherein said tapered tap (10) received with a pull plug.
 6. The odorless drain assembly of claim 1 wherein an inner wall of said perforated sleeve (30) is protruded inward with platelets (34); each of the platelets (34) is protruded inward from a rim of each pore (32) as four-pronged display hook elastically against the inner cylinder (21) by a planar surface.
 7. The odorless drain assembly of claim 1 wherein an open top wall of said perforated sleeve (30) is extended with an outer edge curled down and around to form a clasp portion (33).
 8. The odorless drain assembly of claim 1 wherein inner threads (27) formed on said inner surface of said open top wall of said outer cylinder (23) screwed to an upper-adapter (80 a); said base (22) of said cylinder assembly (20) is extended downward with said drain tube (26) connected to a lower adapter (80 b) in connection with said drainage pipe (60) for draining out water; inner and outer surfaces of said upper and lower adapters (80 a, 80 b) are provided and formed with different numbers of threads (81 a, 81 b).
 9. The odorless drain assembly of claim 8 wherein said upper and lower adapters (80 a, 80 b) are extended horizontally with a rigid outer edge shaped in hexagonal shape and circular shape respectively to form clasp portions (82) to facilitate rotations of said upper and lower adapters (80 a, 80 b) manually.
 10. The odorless drain assembly of claim 8 wherein said lower adapter (80 b) consists of an outer cylinder (83) with an open bottom wall, and an inner cylinder (84); said inner cylinder (84) is connected with said outer cylinder (83) integrally by a common top (85); inner and outer surfaces of said inner and outer cylinders (83, 84) are provided and formed with different numbers of threads (81 a, 81 b).
 11. The odorless drain assembly of claim 8 wherein a bottom end of the inner threads (27) is formed with an annular groove (28), a sealing ring (90) is * led into the annular groove (28) to prevent flowing water from leaking out. 